EU Says Tax Incentives Provided by State of Washington Broke International Trade Rules

BRUSSELS—The European Union on Friday filed a complaint at the World Trade Organization alleging that billions of dollars of tax breaks handed to U.S. aviation company Boeing Co. by Washington state violated international trade rules.

The complaint extends a long-running trade battle between the U.S. and the EU over their respective aviation champions: Boeing and Airbus Group NV, based in Toulouse, France.